Sanding cylinder for drills

ABSTRACT

A sanding cylinder for utilization in combination with a hand held electric drill. The sanding cylinder includes a shaft secured to a cylindrical sanding head. A rotatable sanding sleeve is secured around the sanding head. Sand paper is retained on the sanding cylinder by securing the ends of the sanding strip tightly adjacent the outer circumference with the ends pinchingly engaged in the head groove by the sleeve slot.

[ Nov. 4, 1975 [54] SANDING CYLINDER FOR DRILLS FOREIGN PATENTS OR APPLICATIONS 124,115 3/1919 United Kingdom................... 51/364 m a h S 5 51 22 ,2 8% EX 6 .mo .1 an n m En A n a RS n m n e V n I 6 7 1.

Primary Examiner-Othell M. Simpson Attorney, Agent, or FirmWillard J. Hodges, Jr.

W 9 1 3 1 2 2 N 0 N m m. D. FA 1] 21A 22 ABSTRACT A sanding cylinder for utilization in combination with [52] US. 51/368; 51/170 PT 1311 133 aaa'iijijijjjfi 5"I /;?i68 e heed hele eleeeee eefllh ending eylieeee 5 1 89 358 6 cludes a shaft secured to a cylIndrical sanding head A rotatable sanding sleeve is secured around the sanding head. Sand paper is retained on the sanding cylinder by securing the ends of the sanding strip tightly adjacent the outer circumference with the ends pinchingly References Cited UNITED STATES PATENTS O 1 S e a m 6 U a m e .h 8 a m M 0 was d m a a e l h C e 5 m n .1 d a. a g n e XT 6 39 SBU w 1,374,052 Brauner et al. 2 980 2/1939 3,597,883 8/1971 m t e .m 0 a h C U.S. Patent Nov. 4, 1975 3,916,586

SANDING CYLINDER FOR DRILLS BACKGROUND OF THE INVENTION periphery of the sanding cylinder by means of pinching l engagement between slot in the sanding sleeve slidably secured to the periphery of a sanding head.

2. Description Of Prior Art Numerous related devices have been previously developed and patented. Various methods of securing the abrasive surface to a sanding drum or cylinder are well known to the art. One method is to form the sand paper in a hollow cylindrical sleeve which is placed over a sanding cylinder and secured by friction or tightening securing nuts against a rubber cylinder expanding the outer diameter securing the sand paper. Other methods comprise the securing of sand paper to the roller by means of clamping the ends of the sheets of sand paper between the roller and a retaining strap. Other methods employed were the securing of the lead edge of the strip of sand paper to the cylinder permitting the trailing edge to wrap around the cylinder as the device is rotated. Typical examples of the patented prior art are U.S. Pat. No. 3,774,354 to Taylor, Pat. No. 3,648,413 to Godwin, and Pat. No. 2,259,685 to Elsloo.

SUMMARY OF THE INVENTION This invention relates to a sanding drum designed to be secured by means of a shaft to an electric drill. The principal improvement incorporated in this invention is a new, simplified method for securing the replaceable sand paper abrasive surface adjacent the periphery of the sanding cylinder. Suitable strips of sand paper may be cut from a sanding sheet, wrapped around the peripheral surface of the sanding cylinder then by inserting a narrow fold at each end of the sand paper slip into the slot in the rotatable sleeve mounted around the sanding head and rotating the sleeve relative to the sanding head. The sand paper is gripped in the head groove and sleeve slot securely attaching the strip of paper to the periphery of the sanding cylinder.

BRIEF DESCRIPTION OF THE DRAWINGS to a shaft by means of the sleeve pin.

FIG. 3 is an alternate construction illustrating a sanding head secured to the shaft by means of a shaft head flare with a sleeve pin projecting into the periphery of sanding head.

FIG. 4 is an exterior view of the sanding cylinder including the sanding sleeve rotatably mounted around the sanding head. The sleeve pin limits rotation of the sanding sleeve.

FIG. 5 is a plan view of ;a replaceable strip of sand paper to be secured to the periphery of sanding cylinder.

FIG. 6 is an end view of the completedevice with all components in position illustrating the sand paper secured around the sanding cylinder. FIG. 6 is taken substantially on line 66 of FIG. 1 looking in the direction of the arrows.

FIG. 7 is an end view of a fragmented sanding hea 0 principally illustrating the head groove.

FIG. 8 is an end view of a fragmented sanding sleeve to be mounted around a sanding head.

DESCRIPTION OF THE PREFERRED EMBODIMENT The preferred embodiment was constructed for utilization in combination with a hand drill having a /1 inch chuck. The sanding cylinder 10 was constructed from a combination of readily available materials. A piece of inch tubular metal stock 4 inches long was employed as shaft 1 1. To the shaft 11 was secured sanding head 12 constructed from a round cylinder of wood approximately 1 /2 inches long and 1 /2 inches in diameter. This sanding head 12 is secured to shaft 11 after which a sanding sleeve 13 constructed of a section of plastic pipe was snugly mounted around the sanding head 12. An elongated head groove 14 was cut in the periphery of sanding head 12 approximately one-fourth inch wide and one-fourth inch deep. A compatible sleeve slot 15 was cut also in the sanding sleeve projecting through and for the entire length of the sanding sleeve ,13. The sleeve slot 15 is approximately one-eighth inch wide. At the center of sleeve slot 15 normal to the sleeve slot is cut an additional slot one-half inch long projectingin the direction of rotation of the sanding cylinder. The sleeve pin 17 projecting from the sanding head 12 projects into this sleeve rotating slot 18.

Two methods may be employed for securing sanding head to shaft 11. The preferred structure is illustrated in FIG. 2. This method of construction comprised a drilling of a shaft sleeve pin hole 20 through-shaft 11. This sleeve pin hole 20 could be 1/16 inch in diameter and a sleeve pin 17 of compatible diametenisconstructed. The smaller diameter of the lead edge of the sleeve pin 17 would be in this configuration 1/16 inch in diameter, whereas the main body of the sleeve pin 17 could be one-eighth inch in diameter. This results in sleeve pin shoulder 21 being formed adjacent the shaft sleeve pin hole 20. This embodiment leaves an adequate projection of sleeve pin 17 from the periphery of sanding head 12 to limit the rotation of sanding sleeve 13. Another method of construction is illustrated in FIG. 3. This method of construction would comprise the drilling of a hole in the center of the wooden sanding head 12 and the forcibly mounting of shaft 11 in sanding head 12 which included small peripheral projections on the shaft 11 which are designated as shaft head flares 22 illustrated in FIG. 3. In this embodiment a shorter sleeve pin 17 projects into the periphery of sanding head 12.

For further detail of the construction and operation of the preferred embodiment attention. is particularly invited to FIGS. 4 and 6. The final assembly of the device for utilization a strip of sand paper 16 approximately 1 /2 inches wide and slightly longer than the circumference of the sanding cylinder is cut from a sheet of sand paper. Slot folds 23 are formed in each end of the sand paper strip 16 and the sand paper secured to 3 the sanding cylinder substantially as illustrated in FIG. 6. A projection of the slot-folds 23 through sleeve slot 16 in head groove 14 as illustrated in FIG. 6 substantially completes .the assembly. The rotation of the sanding sleeve 13 carrying the sand paper 16 relative to sanding head 12 grips slot folds 23 between sleeve slot and sanding head 12 with the slot folds 23 projecting into head groove 15. Rotation of sanding. sleeve 13 is limited by the length of the sleeve rotating slot 18 and sleeve pin 17. The configuration of the wooden sanding head 12 of the preferred embodiment is as illustrated in the fragmented view FIG. 7 and in a similar fashion the configuration of the sanding sleeve 13 is illustrated in the fragmented view FIG. 8.

OPERATION The operation of this device is rather self evident. The preferred embodiment proved to be quite economical in the use of sand paper 16. Strips of sand paper are far cheaper than purchasing the more complicated sand paper sleeves or cylinders. The device is quite effective in sanding difficult to reach contours and forming wood work. The rapidly rotating sanding cylinder 10 tends to clean the grit surface of sand paper 16. Substantial sanding could be accomplished with maximum economy and conservation of sand paper.

Having described in detail the construction and operation of my invention including two varying methods of construction what is desired to be claimed is all embodiments or similar structures not departing from the scope or equivalence of the appended claims.

I claim:

1. An improved sanding cylinder for drills comprising:

a. a shaft suitable for attaching to a rotating drive means,

b. a substantially cylindrical sanding head having a circumference secured to said shaft by,

c. a shaft cylinder securing means,

d. a sanding sleeve encircling the perimeter of said cylindrical sanding head,

e. a head groove formed in the periphery of said cy lindrical sanding head extending normal from an end of said cylindrical sanding head for substantially the length of said sanding head,

f. a sleeve slot extending normal from one end of said sanding sleeve substantially the length of said sanding sleeve, said head groove and said sleeve slot being arranged substantiallyadjacent and parallel to each other, and l g. means for limiting the relative movement of said sanding sleeve relative to said sanding head comprising:

1. a sleeve pin projecting from the circumference of said cylindrical sanding head into,

2. a sleeve rotating slot constructed in said sanding sleeve projecting substantially normal from said sleeve slot, said structure being so arranged that said sleeve pin projects into said sleeve rotating slot limiting the relative movement of said sanding sleeve around said sanding head to a relatively small arc.

2. The invention of claim 1 wherein said shaft cylinder securing means comprises:

a. a shaft sleeve pin hole projecting through an end of said shaft,

b. a portion of said sleeve pin projecting through a radius of said sanding cylinder sanding head through said sleeve pin hole in said shaft.

3. The invention of claim 1 wherein said shaft cylinder securing means comprises a shaft head flare projecting from the surface of said shaft into said sanding 'head.

4. The invention of claim 1 wherein said means for limiting relative movement of said sanding sleeve relative to said sanding head comprises:

a. a portion of said sleeve pin projecting from the circumference of said cylindrical sanding head into,

b. a sleeve rotating slot constructed in said sanding sleeve projecting substantially normal from said sleeve slot, said structure being so arranged that said sleeve pin projects into said sleeve rotating slot limiting the relative movement of said sanding sleeve around said sanding head to a relatively small arc. I

5. The invention of claim 1 including:

a. a strip of sand paper encircling the outer circumference of said sanding sleeve,

b. each end of said strip of sand paper formed into,

0. a slot fold projecting through said sleeve slot into said head groove in such a manner as to be gripped between said sanding head and said sanding sleeve when said sanding sleeve is rotated through a small are relative to said sanding head. 

1. An improved sanding cylinder for drills comprising: a. a shaft suitable for attaching to a rotating drive means, b. a substantially cylindrical sanding head having a circumference secured to said shaft by, c. a shaft cylinder securing means, d. a sanding sleeve encircling the perimeter of said cylindrical sanding head, e. a head groove formed in the periphery of said cylindrical sanding head extending normal from an end of said cylindrical sanding head for substantially the length of said sanding head, f. a sleeve slot extending normal from one end of said sanding sleeve substantially the length of said sanding sleeve, said head groove and said sleeve slot being arranged substantially adjacent and parallel to each other, and g. means for limiting the relative movement of said sanding sleeve relative to said sanding head comprising:
 1. a sleeve pin projecting from the circumference of said cylindrical sanding head into,
 2. a sleeve rotating slot constructed in said sanding sleeve projecting substantially normal from said sleeve slot, said structure being so arranged that said sleeve pin projects into said sleeve rotating slot limiting the relative movement of said sanding sleeve around said sanding head to a relatively small arc.
 2. The invention of claim 1 wherein said shaft cylinder securing means comprises: a. a shaft sleeve pin hole projecting through an end of said shaft, b. a portion of said sleeve pin projecting through a radius of said sanding cylinder sanding head through said sleeve pin hole in said shaft.
 2. a sleeve rotating slot constructed in said sanding sleeve projecting substantially normal from said sleeve slot, said structure being so arranged that said sleeve pin projects into said sleeve rotating slot limiting the relative movement of said sanding sleeve around said sanding head to a relatively small arc.
 3. The invention of claim 1 wherein said shaft cylinder securing means comprises a shaft head flare projecting from the surface of said shaft into said sanding head.
 4. The invention of claim 1 wherein said means for limiting relative movement of said sanding sleeve relative to said sanding head comprises: a. a portion of said sleeve pin projecting from the circumference of said cylindrical sanding head into, b. a sleeve rotating slot constructed in said sanding sleeve projecting substantially normal from said sleeve slot, said structure being so arranged that said sleeve pin projects into said sleeve rotating slot limiting the relative movement of said sanding sleeve around said sanding head to a relatively small arc.
 5. The invention of claim 1 including: a. a strip of sand paper encircling the outer circumference of said sanding sleeve, b. each end of said strip of sand paper formed into, c. a slot fold projecting through said sleeve slot into said head groove in such a manner as to be gripped between said sanding head and said sanding sleeve when said sanding sleeve is rotated through a small arc relative to said sanding head. 